Outkast

In a Medieval World filled with magic and demons, an ancient ritual is performed by humans. This ritual takes all the children of the ages of 5, 10, and 15, and magically creates a tattoo on their backs, no tattoo the same. In this world, a one year old named Haldis becomes the impossible. On her first birthday, without going through the tattooing ceremony, the tattoos appear on her wrists. Even stranger is that Haldis used to be a 17 year old girl on Earth who died and was reincarnated. Now Haldis has to struggle through learning magic, being coveted by nobility, and even fighting the Demon King, all while wishing that she stayed home and read a book.

For those of you who do not want to read the prologue, you need to. A good portion of the story will not make sense if you don't. It's short. Suck it up.